The DATALENGTH() function returns the number of bytes used to manage a value. : DATALENGTH « System Functions « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » System Functions » DATALENGTH

25.7.2.The DATALENGTH() function returns the number of bytes used to manage a value.

3>

4> DECLARE @Value VarChar(20)

5> SET @Value = 'abc'

6> SELECT DATALENGTH(@Value)

7> SELECT LEN(@Value)

8> GO



-----------

          3



(1 rows affected)



-----------

          3



(1 rows affected)

25.7.DATALENGTH
	25.7.1.	Using DATALENGTH to determine length of a string value.
	25.7.2.	The DATALENGTH() function returns the number of bytes used to manage a value.
	25.7.3.	SELECT DATALENGTH(@Value2)
	25.7.4.	DATALENGTH Versus COL_LENGTH to determine length of a string value.

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